Malicious PDF — malware analysis report

Static analysis result for SHA-256 e283d069f37080f4…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 20:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57a700a0fa021dcc3e303596380b5e76 SHA-1: 44cb5fab460081f48f1820eed5b0a305f90a8a85 SHA-256: e283d069f37080f406ed8bdd2cc4a0ce3e0f7d03a96bc7ad75d299e695ae8369
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though partially garbled, contains text suggesting a lure related to 'Mailchimp export reports'. The presence of numerous embedded links, many pointing to 'static.usrfiles.com', further supports the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=mailchimp+export+reports
    • https://static.usrfiles.com/ugd/913720_156196d0b88e4d119a166e7022fe613c.pdf
    • https://static.usrfiles.com/ugd/8d0191_d6c79bdd27554d5083986bcfe70cff8c.pdf
    • https://static.usrfiles.com/ugd/77941b_144d35a2085846e4a3232ad01d0af1ef.pdf
    • https://static.usrfiles.com/ugd/72b0e7_014a1b82c6534f45980fd8717a28db44.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0da1d4032d04b75bf8ad127122a9d82.pdf
    • https://static.usrfiles.com/ugd/b6edda_f14591bf66ca48ee99bf2a46d27bd58a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1c52407394504aaeba3a17284267aed0.pdf
    • https://static.usrfiles.com/ugd/de65f7_101ceb3ec5754babac670779fc21379d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a42262263df4cbd8bf878a3eda5f33c.pdf
    • https://static.usrfiles.com/ugd/39cb9d_4d0655460c31445a9da9fb8dc8e39ea2.pdf
    • https://cdn.shopify.com/s/files/1/0434/2598/8757/files/50347797386.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/27618122771.pdf
    • https://cdn.shopify.com/s/files/1/0437/5887/8881/files/praia_de_supertubos_mapa_de_mexico.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e2c.bin
c8643b5a22df84ac1e7031ade7e9983512d2acf2f02ae97127fdd495d15824a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2C 4928 bytes
font_01_sfnt_off00006ee7.bin
4d06c4673ecc2bb66222bd3f3c769b080c0a434795b88fb8d08278d5a5153b1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE7 9940 bytes
font_02_sfnt_off000090e0.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E0 4324 bytes

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